* tests/gpgscm/scheme-private.h (struct cell): Add a compact vector
representation.
* tests/gpgscm/scheme.c (vector_length): Use new representation.
(vector_size): New macro.
(get_vector_object): Use the new representation.
(fill_vector): Likewise.
(vector_elem): Likewise.
(set_vector_elem): Likewise.
(mark): Likewise.
(gc): Likewise. Be careful not to confuse immediate values for type
flags.
(finalize_cell): Vectors now require finalization.
--
Previously, vectors were represented using consecutive cons cells,
wasting one word per cell for the type information. Fix that by using
a flat array.
Previously, a vector of size N required 1 + (n + 1) / 2 cells. Now it
uses 1 + (n - 1 + 2) / 3 cells.
Signed-off-by: Justus Winter <justus@g10code.com>
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